CN102300723B - Tyre For Two -wheeled Vehicle And Process For Manufacturing The Same - Google Patents
Tyre For Two -wheeled Vehicle And Process For Manufacturing The Same Download PDFInfo
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- CN102300723B CN102300723B CN200880132718.9A CN200880132718A CN102300723B CN 102300723 B CN102300723 B CN 102300723B CN 200880132718 A CN200880132718 A CN 200880132718A CN 102300723 B CN102300723 B CN 102300723B
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- tire
- strip component
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- strip
- angle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
- B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
- B60C9/20—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
- B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
- B60C9/28—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers characterised by the belt or breaker dimensions or curvature relative to carcass
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T152/00—Resilient tires and wheels
- Y10T152/10—Tires, resilient
- Y10T152/10495—Pneumatic tire or inner tube
- Y10T152/10765—Characterized by belt or breaker structure
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
- Tyre Moulding (AREA)
Abstract
Belt structure (2) for two-wheeled vehicle made by means of strip-like segments or elements (15) each comprising parallel cords embedded in an elastomeric layer, sequentially laid along the circumferential extension of a toroidal support (3) so as to form a reinforcing layer (2) having a continuous circumferential extension around a geometric rotation axis (X-X) of said toroidal support (3), wherein - each strip-like element (15) is laid in a laying trajectory (T) defining, at each point, a laying angle (a); - at each point of the laying trajectory (T) a laying gap (g) is formed between adjacent strip-like elements (5); - said laying trajectory (T) is formed starting from preselected laying angles on the shoulder (asp) and on the crown (ac) of the tyre; - the laying gap ( g) between adjacent strip-like elements (5) varies along at least one length of said laying trajectory (T) between crown and shoulder so as to cause variation of said laying angle (a) and obtain said preselected angles on the shoulder (asp) and on the crown (ac).
Description
Technical field
The present invention relates to a kind of tire for sulky vehicle and for the manufacture of the technique of this tire.
Particularly, the present invention relates to a kind of tire for sulky vehicle that strengthens structure that is provided with, this enhancing structure applies strip component by the circumferential extension along ring-shaped bearing portion and obtains.Described in each strip component comprise be arranged to be parallel to each other and be coated with at least in part at least longitudinal enhancing linear element of one deck elastomeric material.
Background technology
Tire for wheel generally includes the carcass structure being mainly comprised of one or more casingply, this one or more casingply is configured as the configuration of general toroidal and makes the transverse edge of its axial opposed and corresponding ring-type strengthen structural engagement, and this ring-type strengthens structure and is combined with the annular metal embolus that is commonly referred to " bead core ".Each ring-type strengthens structure and is embedded in so-called " tyre bead " for the latter being anchored into corresponding installation wheel rim.
In the position of the radially outer of carcass structure, be applied with and comprise that one or more is the belt structure of the bracing ply of closed-loop form, this bracing ply mainly by relative to each other suitably orientation and with respect to the cord that belongs to adjacent casingply, suitably fabric or the metal cords of orientation form.
In the position of the radially outer of belt structure, be also applied with conventionally the tread strip that the elastomeric material bar by suitable thickness forms.Be noted that the object for this specification sheets, term " elastomeric material " means a kind of compound that comprises at least one elastomer polymer and at least one enhancing weighting material.Preferably, this compound also comprises additive, for example crosslinking agent and/or plasticizer.Due to the existence of crosslinking agent, this material can be cross-linked by heating, thereby forms final manufacture article.
Opposition side at tire is applied with pair of sidewall, and each sidewall covers a sidepiece between the so-called shoulder zone of being included in of tire and corresponding tyre bead, and this so-called shoulder zone is positioned near the corresponding transverse edge of tread strip.
Recently, concerned is especially the research to the production method of crude product in the middle of can manufacturing, and this production method is intended to eliminate or limit the use of at least in part tire building.For example, in same Applicant European patent EP 09288680 under one's name, a kind of method of manufacturing tire is disclosed, wherein casingply and each bracing ply are to obtain by lay successively a plurality of strip components with circumferential close relation in ring-shaped bearing portion, and this ring-shaped bearing portion is configured as with the interior configuration of the tire that will obtain mates.
In same Applicant document WO01/38077 under one's name, disclose by laying the strip component cut to manufacture the another kind of method and apparatus for the bracing ply of vehicle tyre from continuous strip component.At length, the circumferential extension along ring-shaped bearing portion applies the strip component of cutting open and can between a strip component and the next strip component of laying, not leave interval with mutual close relation.Aforementioned applications allows to obtain at least one enhancement layer, and this at least one enhancement layer has around the continuous circumferential extension of how much rotation axiss of ring-shaped bearing portion.In this application process, around roughly radially determining that in the axis correction of how much rotation axiss of ring-shaped bearing portion the relative angle between strip component and ring-shaped bearing portion rotates, near with the end of avoiding strip component tire shoulder overlapping.When the tire with for four wheeler contrasts, for the tire of sulky vehicle, need to provide very unique performance, this relates to many textural differences.A most important difference comes from the following fact: when sulky vehicle travels on bend, in contrast to it in straight line distance is up while sailing attitude, it must laterally tilt to great degree, thereby forms and can reach 45 ° or under difficult operating condition, be even the angle (being called camber angle) of 65 ° with the vertical line on ground.Therefore,, when sulky vehicle is when the bend, the contact area of tire moves to the axial outermost regions bend center position gradually from the central area of tyre surface.Due to this reason, for the tire of sulky vehicle, be characterised in that its obvious cross curvature.This cross curvature is normally defined the paricular value of ratio, this ratio be the radially exterior point between tyre surface measured on the equatorial plane of tire with the line of side direction phase opposing pole through tyre surface self between the ratio of the distance measured for the tire string of a musical instrument along between described limit of distance.
Compare with 0.05 the curvature ratio of being typically about in four wheeler tire situation, at the tire for sulky vehicle, curvature ratio is generally at least up to 0.15 and in rear tire situation normally about 0.3 or even higher, until in front tyre situation about 0.45.
In addition, at the tire for sulky vehicle, the continuous cord that belt structure can be wound in axially close coil by one or more forms, and these coils are roughly parallel to the circumferential bearing of trend (so-called " nullity belt bundle ") of tire.
Alternatively, belt structure can comprise two radially superimposed layers, each layer comprises the elastomeric material strengthening with the cord of being arranged to be parallel to each other, described layer is arranged so that the cord of the first bracing ply is oriented the equatorial plane that favours tire, the cord of the second bracing ply has same tilted alignment simultaneously, but intersects symmetrically (so-called " cross band bundle ") with respect to the cord of ground floor.
The angle of orientation of the cord of each layer is very important for some feature obtaining in tire.For example, the lower value at this angle on tire shoulder and crown (being tending towards 0 °), corresponding to the high stability in straight line distance but poor lateral thrust.
On the contrary, the high value at the described angle on tire shoulder and crown, corresponding to higher driving comfort but the turning stability reducing.
Applicant recognizes, at the tire for sulky vehicle, the strip component of laying for the manufacture of so-called cross band bundle according to the instruction of prior art is difficult to carry out; In fact, overlapping for fear of the end of strip component at tire shoulder place, the higher curvature of these tires relates to angularity correction in the cards hardly.
Applicant also has been noted that tiremaker must be set to cord on crown and with given angle cord is set on tire shoulder and is selected between the two in the angle with given according to the instruction of application WO01/38077.In other words, tiremaker can not at random be selected the best angle of cord on tire shoulder and crown, and this best angle is the function that tiremaker is desirably in the feature obtaining in tire.
In this case, in fact, the angle of the cord on crown depends on the curvature of profiled outline of angle on tire shoulder, tire and primary for avoiding the end of described strip component in the overlapping angularity correction applying at tire shoulder place.
Applicant has been found that now in order to manufacture bracing ply, if lay the strip component of integral value N, N is less than integral value N
0, N
0be each strip component under the line the ply angle at face place, the transverse width L of strip component and bracing ply at the circumferential extension S at the equatorial plane place of tire
cfunction, can obtain so the angle of the pre-selected of the cord on tire shoulder and crown.Like this, the cord angle on tire shoulder and crown will be no longer the curvature of tire and for avoiding the function of the overlapping angularity correction applying of band bundle end, but the function of the expected performance of tire.
Applicant also has been found that if the laying interval between two adjacent strip components is on purpose controlled, and so also can obtain and in the end of strip component, there is no overlapping bracing ply and obtain thus the band bundle with higher structural homogeneity.
Summary of the invention
In first aspect, the present invention relates to a kind of tire for sulky vehicle, it comprises:
The carcass structure of-general toroidal, it comprises the sidepiece of center bizet and two axial opposed, each sidepiece is associated with corresponding bead structure;
-the belt structure of ring-type roughly, bizet place, Qi center is applied to the position of the radially outer of carcass structure;
-tread strip, it is applied to the position with respect to the radially outer of belt structure;
-pair of sidewall, each sidewall covers and is included in the transverse edge of tread strip and the tire sidepiece between corresponding bead structure;
-described tire has cross curvature ratio f/C >=0.2 and sidewall height ratio (H-f)/H≤0.7;
-described belt structure comprises that at least one is formed with the bracing ply of a plurality of strip components, and each strip component comprises is arranged to the enhancing linear element that is parallel to each other along the longitudinal direction of strip component;
-each enhancing element is laid on and lays in track (T), and this laying track (T) is limited with the ply angle (α) with respect to the radial plane (λ) through this point of tire at each point;
-described the strip component that forms described bracing ply is rendered as and is less than integral value N
0integral value N, N
0be defined as following whole part:
integer│（S
c/L*sinα
c）│
Wherein:
S
cthat bracing ply is in the circumferential extension at the equatorial plane place of tire;
α
cit is the ply angle at the equatorial plane place of tire;
L is the transverse width of each strip component.
Also be arranged to the ply angle (α at tire shoulder place
sp) be greater than the ply angle (α at the equatorial plane place of tire
c).
In one embodiment, bracing ply comprises between last of a strip component and strengthens variable distance or interval (Δ g) in mutually extrorse at least a portion between first enhancing element of the next strip component in element and circumferential direction, at adjacent strip component.
In specification sheets and appending claims, following situation is not considered: due to the mistake in process of deployment, only in one or strip component that some are adjacent, form between last of a strip component and strengthen the distance (Δ g) between first enhancing element of element and next strip component.In this case, in fact, deviation is normally less, is less than or equal to 1mm, and the minority strip component of the most multipair formation band bundle repeats.
According to an embodiment, the variation of distance (Δ g) is relevant to the angle difference at the tire shoulder at tire and equatorial plane place, makes (α
sp) – (α
c)>=3 °.
Laying interval between two strip components being also arranged in succession lay is included in 0.35mm in the scope of 4mm, and extreme value is included.
According to a favourable aspect of the present invention, the angle α at equatorial plane place
c>=14 °.
Advantageously, the angle α at equatorial plane place
c≤ 24 °.
The aspect favourable according to another, the angle α at tire shoulder place
sp>=21 °.
Advantageously, the angle α at tire shoulder place
sp≤ 30 °.
On the other hand, the present invention relates to the technique for the manufacture of the tire for sulky vehicle, described tire is the type that is provided with cross curvature ratio f/C >=0.2 and sidewall height ratio (H-f)/H≤0.7;
Described technique comprises the steps:
-manufacture the carcass structure of general toroidal, described carcass comprises the sidepiece of center bizet and two axial opposed;
-at bizet place, center, manufacture the belt structure of general toroidal, described belt structure is positioned at the position of the radially outer of carcass structure;
The step of described manufacture belt structure comprises by laying a plurality of strip components to manufacture at least one bracing ply on described carcass structure, and each strip component comprises is arranged to the enhancing linear element that is parallel to each other along the longitudinal direction of strip component;
Wherein, the step of described at least one bracing ply of manufacture comprises:
-determine on tire the ply angle α of the enhancing element at tire shoulder place that expectation obtains
spply angle α with the enhancing element at equatorial plane place
c;
-being identified for manufacturing bracing ply and the integral value N of the strip component laid, N is less than integral value N
0, N
0that each strip component is with respect to the ply angle (α of the described equatorial plane
c), the transverse width L of each strip component and bracing ply be at the circumferential extension S at the equatorial plane place of tire
cfunction;
-determine that the laying track (T) of strip component, this laying track (T) are limited with the ply angle (α) with respect to the radial plane through this point of carcass structure at each some place, thus described angle α obtained
sp, α
c;
-according to aforementioned laying track (T), lay each strip component.
According to an embodiment, N
0be defined as following whole part:
integer│（S
c/L*sinα
c）│
Advantageously, lay step to avoid the end of strip component to carry out in the overlapping mode at tire shoulder place.
Preferably, the laying distance (Δ g) between adjacent strip component is at least one section of upper variation of the corresponding laying track (T) of two strip components in succession laying along circumferential direction, to obtain the angle (α being greater than at the equatorial plane place of tire
c) the angle (α on the tire shoulder of tire
sp).
More preferably, laying between adjacent strip component distance (Δ g) changes, to obtain angle on the tire shoulder of tire and at the angle at the equatorial plane place of tire, wherein (α
sp) – (α
c)>=3 °.
According to an embodiment:
Strip component interval (Δ g) between-mono-strip component and the next strip component of laying is at least one section of upper variation of the corresponding laying track (T) of two strip components in succession laying along circumferential direction between the equatorial plane and tire shoulder, to produce the variation of described ply angle (α), and the angle of pre-selected on acquisition tire shoulder and the angle of the pre-selected at equatorial plane place.
According to an embodiment:
The strip component interval (Δ g) between a strip component and the strip component of next laying at-laying track (T) and each laying point place is following function:
-largest interval (the Δ g that applies
max);
The width L of-strip component;
The angle α of-described pre-selected on tire shoulder
spthe angle α of the described pre-selected at face place under the line
c.
According to an embodiment, described technique comprises the following steps:
-calculating is corresponding to the number (N of the strip component at the angle on tire shoulder
sp) with the number (N of strip component corresponding to the angle at equatorial plane place
c) between the minimum value in integer: min(
integer│ N
sp; N
c│);
-calculating N
1=min(
integer│ N
sp; N
c│)-1
-calculate for N
1two strip components on tire shoulder between interval (Δ g
sp) and interval (the Δ g between two strip components at face place under the line
c);
-by (Δ g
sp) and (Δ g
cr) with the Δ g that applies
maxcontrast:
If Δ g
sp≤ Δ g
maxand Δ g
c≤ Δ g
max, set so N
1=N;
On the contrary, if Δ g
sp>=Δ g
maxor Δ g
c>=Δ g
max, so along with the variation of n is with min(
integer│ N
sp; N
c│)-n calculates N
n, and recalculate for each N
ntwo strip components on tire shoulder between corresponding interval Δ g
spand the corresponding interval Δ g between two strip components on crown
c; Set N=N
n, N wherein
nto meet relational expression Δ g
sp(N
n)≤Δ g
maxwith Δ g
c(N
n)≤Δ g
maxthe integral value of strip component.
Advantageously, N
c=(S
c/ L
c) * sin α
cand N
sp=(S
sp/ L
sp) * sin α
sp, wherein, S is the circumferential extension at place, α angle bracing ply.
Advantageously, Δ g
sp=S
sp/ N
n– L
sp/ sin α
spand Δ g
c=S
c/ N
n– L
c/ sin α
c.
Accompanying drawing explanation
From to vehicle according to the invention tire and for the manufacture of having the detailed description of preferred but non-exclusive embodiment of technique of the tire that strengthens structure, it is more obvious that other features and advantages of the present invention will become.With reference to the accompanying drawing providing as non-limiting example, carry out this description hereinafter, in accompanying drawing:
-Fig. 1 is the local radial cross sectional drawing intercepting in the plane of the rotation axis of the tire for sulky vehicle according to the present invention radially;
-Fig. 2 is the approximate vertical view of tire shown in Fig. 1, and its mode with example shows four strip components of the formation bracing ply of laying according to the present invention;
-Fig. 3 is the local radial cross sectional drawing intercepting in the plane of the rotation axis of the second embodiment of the tire for sulky vehicle according to the present invention radially;
-Fig. 4 is the approximate vertical view of the embodiment of tire shown in Fig. 3, and its mode with example shows four strip components of the formation bracing ply of laying according to the present invention;
-Fig. 5 shows intrinsic laying track T with chart (the circumferential angle of strike of strip component track)
0and T
maxtwo curves and according to the angle α with the different pre-selected on tire shoulder and crown of the present invention
spand α
crsome lay tracks.
The specific embodiment
With reference to accompanying drawing, the tire for sulky vehicle according to the present invention is with 1 expression.Particularly, described tire 1 comprises the carcass structure 2 that is provided with at least one casingply 2a, this at least one casingply 2a is configured as the configuration of general toroidal and strengthens structural engagement through its contrary circumferential edge and at least one ring-type, thereby forms the structure of " tyre bead " 4 conventionally by name.
Belt structure 5 is circumferentially applied to the radially outer position of carcass structure 2, in this belt structure 5, is circumferentially superimposed with tread strip 8.After the molded operation of carrying out together with the sulfuration with tire, form the groove of vertical and horizontal on described tread strip 8, these grooves are configured to limit " tread contour " of expectation.Tire in known way also comprises the pair of sidewall 9 on the opposite side that is laterally applied to carcass structure 2.
Described tire 1 has the cross-sectional plane that is characterized as high-transverse-curvature and low section sidewall, defined in below.
Particularly, tire 1 have on face under the line, measure, between the center of tread strip and close the section height H between diameter (fitting diamter), be somebody's turn to do and closing diameter and represented by the line of reference r through tire bead.
Tire 1 also has the width C being limited by the distance between the horizontal contrary limit E of tyre surface, and the curvature being limited by the ratio paricular value apart between f and described width C, this is distance that measure on the equatorial plane of tire, from the line through the limit E of described tyre surface to tyre surface center apart from f.
In this specification sheets and claims subsequently, " higher curvature tire " means curvature ratio f/C >=0.2 and the tire of f/C >=0.28 preferably.Under any circumstance this curvature ratio f/C all≤0.8 and preferably f/C≤0.5.
For sidewall, the present invention is preferably applied to have the sidewall that section the is low especially tire of (Fig. 1, Fig. 3).In other words, the low section sidewall in this specification sheets means sidewall height ratio (H-f)/H and is less than 0.7, is more preferably less than 0.5(referring to Fig. 1,3) tire.
Get back to belt structure 5, be noted that it comprises the bracing ply 5a that at least one is formed by a plurality of strip components 15, each strip component 15 comprises is arranged to the enhancing linear element 13 that is parallel to each other along the longitudinal direction of strip component 15.
In this manual, term " strip component " means to be provided with the part that a dimension (length) surpasses the continuous strip component of two other dimension (width, thickness), this continuous strip component comprise be arranged to be parallel to each other and be coated with at least in part at least longitudinal reinforcing cord 13 of one deck elastomeric material.Particularly, preferably, strip component has between the width between 3mm and 25mm, between the thickness between 0.5mm and 2mm, comprises the cord quantity between 2 and 40, and preferably has between the density between every decimeter of 60 every decimeter of cord and 130 cord.
As better illustrated in Fig. 2, each strip component 15 is arranged on to be laid in track (T), and this laying track (T) is limited with the ply angle α with respect to the radial plane λ through this point of tire at each some place.
Ply angle (α) also can be considered to be in each and strengthen the angle surrounding between the principal spread direction of linear element and the circumferential direction of tire.
Should also be noted that each ply angle (α) is different from zero substantially, and can when moving from the equatorial plane to tire shoulder, change.
Particularly, the ply angle (α on tire shoulder
sp) be always greater than the ply angle (α at face place under the line
c).
Strip component 15 is configured to form bracing ply 5a, and its set-up mode is to obtain strip component interval (Δ g) between a strip component and the next strip component of laying.
Particularly, strip component interval (Δ g) is defined as the distance between last enhancing element 13 of a strip component and first enhancing element 13 of the next strip component 15 in circumferential direction.
As better illustrated in Fig. 3 and Fig. 4, when the equatorial plane from tire shoulder to tire moves, strip component interval (Δ g) changes for mutually extrorse at least a portion of adjacent strip linear element.
Particularly, the strip component interval of the bracing ply 5a shown in Fig. 2 (Δ g) increases when moving from equatorial plane Y-Y ' to tire shoulder, and the strip component interval of locating at this equatorial plane Y-Y ' (Δ g) equals zero substantially.Otherwise the strip component interval of the bracing ply 5a shown in Fig. 4 (Δ g) reducing when tire shoulder moves from equatorial plane Y-Y ', at the strip component interval at this tire shoulder place (Δ g), substantially equal zero.
Strip component interval (Δ g) between a strip component 15 and the next strip component of laying is along at least one section of variation of the laying track (T) between the equatorial plane and tire shoulder, to produce the variation of ply angle (α), and obtain the ply angle of the pre-selected on tire shoulder and crown.
In all cases, the variation of strip component interval (Δ g) is relevant with the difference of the angle at the equatorial plane place of tire on the tire shoulder of tire, makes (α
sp) – (α
c)>=3 °.
According to a favourable aspect, the angle α at face place under the line
c>=14 °.
Advantageously, the angle α at face place under the line
c≤ 24 °.
Another favourable aspect, at the angle at tire shoulder place α
sp>=21 °.
Advantageously, at the angle at tire shoulder place α
sp≤ 30 °.
Strip component interval (Δ g) changes between 0.35mm and 4mm, and extreme value is included.
Preferably, the strip component interval (Δ g) at each the laying point place between the edge of two strip components 15 in succession laying is preferably between 0.5mm and 2.5mm, and extreme value is included.
According to the present invention, the strip component that forms bracing ply 5a is rendered as and is less than integral value N
0integral value N, N
0be defined as following whole part:
integer│（S
c/L*sinα
c）│
Wherein:
S
cthat bracing ply is in the circumferential extension at the equatorial plane place of tire;
L is the transverse width of each strip component 15.
In this manual, symbol " integer │ │ " is illustrated in two integers in vertical bar.
In second aspect, the present invention relates to a kind of technique for the manufacture of the tire for sulky vehicle, this tire is the type of cross curvature ratio f/C >=0.2 and sidewall height ratio (H-f)/H≤0.7.
The present invention can advantageously put into practice in a manufacturing process, and according to this manufacturing process, belt structure self is suitable for being formed in the ring-shaped bearing portion with outside face, and the shape approximate match of this outside face is in the interior configuration of the tire 1 that will obtain.
Before carrying out the manufacture of belt structure 5, carcass structure 2 is applied in ring-shaped bearing portion, can like that this carcass structure be easily formed in identical ring-shaped bearing portion according to all any patent is described in patent EP0943421, EP0928680 under one's name of same Applicant, EP0976535, EP01124699.Because the ring-shaped bearing portion can not being described in detail with arbitrary mode manufacture easily by those skilled in the art for example can comprise that detachable or Demountable metallic drum is to contribute to remove from the tire being obtained subsequently described drum.But, do not get rid of following possibility: direct preparation belt structure on the carcass structure of for example suitably strengthening by inflation, thus described carcass structure is also carried out the function of ring-shaped bearing portion in this case.
The belt structure 5 of manufacturing for vehicle according to the invention tire relates to the strip component 15 that applies the width (L) of given number (N) along the circumferential extension of ring-shaped bearing portion, to form at least one enhancement layer 5a, this at least one enhancement layer 5a is provided with around the geometry axis X-X of ring-shaped bearing portion self ' the circumferential extension of basic continous.
As aforementioned, each strip component 15 comprises to be arranged to be parallel to each other and to be coated with at least in part at least longitudinal linear element of enhancing of one deck elastomeric material.
In addition, should be noted that, the strip component 15 of a plurality of predetermined lengths and width for example obtains by least one continuous strip component is carried out to cutting operation in order in known manner, and this continuous strip component comes to squeeze and prolongs device and/or calender device, or comes from and feed reel.This continuous strip component therefore and as the aforementioned all has a plurality of metals of extending parallel to each other along the longitudinal extension part of this continuous strip component or linear element and/or the cord 13 of textile material from the strip component 15 of its acquisition subsequently.
Each strip component 15 is arranged on the outside face of ring-shaped bearing portion in laying track (T), and this lays track (T), and at each point, the ply angle (α) by the radial reference plane through this point with respect to ring-shaped bearing portion limits.
To avoid the end of strip component 15, in the great overlapping mode at tire shoulder place, lay.
Lay the ply angle α that track (T) forms the pre-selected from the tire shoulder of tire
spply angle α with the pre-selected at the equatorial plane place of tire
cstart.
Lay mode that track (T) obtains and be make to have at each some place of laying track (T) between strip component 15 and the next strip component of laying, concrete be to strengthen the strip component interval (Δ g) between first enhancing element 13 of the next strip component 15 in element 13 and circumferential direction in last of a strip component 15.
In last of strip component 15, strengthening strip component interval (Δ g) between first enhancing element 13 of the next strip component 15 in element 13 and circumferential direction changes with controlled mode with that be scheduled to along at least one section of the laying track (T) between tire shoulder and the equatorial plane.
Particularly, strip component interval (Δ g) changes with predetermined mode with controlled between mutually extrorse at least a portion of adjacent strip component 15.
In other words, as example, strip component interval (Δ g) can change and then keep constant at the initial segment that leaves the equatorial plane, or as in the example of Fig. 2, Fig. 4, can change along whole laying track (T).
In order successfully to obtain the angle (α of the pre-selected on tire shoulder
sp) and the angle (α of the pre-selected at equatorial plane place
c), strip component interval (Δ g) changes with predetermined mode with controlled.
Particularly, strip component interval (Δ g) is to obtain the angle α being always greater than at the equatorial plane place of tire
cangle α
spmode change.
Strip component interval is relevant to angle difference on tire shoulder and crown and have (a α
sp) – (α
cthe character of)>=3 °.
In addition, be noted that the strip component interval (Δ g) that laying track (T) and each the laying point between a strip component 15 and the next strip component of laying are located is following function:
-largest interval (the Δ g that applies
max);
The width L of-strip component;
-described pre-selected angle α on tire shoulder
spdescribed pre-selected angle α with equatorial plane place
c.
In order obtaining, to lay track T, to start to calculate the number (N corresponding to the strip component 15 at the angle on tire shoulder
sp) with the number (N of strip component corresponding to the angle at equatorial plane place
c) between the minimum value in integer: min(
integer│ N
sp; N
c│).
Wherein, N
c=(S
c/ L
c) * sin α
c, Sc is bracing ply in the circumferential extension at the equatorial plane place of tire and α
cat the angle at this plane place, and N
sp=(S
sp/ L
sp) * sin α
sp, S
spthat bracing ply 5a is in the circumferential extension at tire shoulder place.
This moment, set N
1=min(
integer│ N
sp; N
c│)-1 and calculate corresponding to N
1strip component interval (the Δ g on tire shoulder
sp) and strip component interval (the Δ g at equatorial plane place
c); Particularly, Δ g
sp=S
sp/ N
1– L
sp/ sin α
spand Δ g
c=S
c/ N
1– L
c/ sin α
c.
Now by Δ g
spwith Δ g
cwith applied Δ g
maxcontrast; If Δ g
sp≤ Δ g
maxand Δ g
c≤ Δ g
max, set so N
1=N; Therefore, N be laid to form according to the true number of the strip component 15 of bracing ply of the present invention, this bracing ply has the angle α of face Y-Y ' and tire shoulder place under the line
cand α
sp, these two angles are as the function of the performance characteristic that expectation obtains on tire and selected.
Alternately, if Δ g
sp>=Δ g
maxand/or Δ g
cr>=Δ g
max, so along with the variation of n is with min(
integer│ N
sp; N
c│)-n calculates N
n, and repeat aforesaid operations.In other words, recalculate corresponding to new number N
nstrip component interval (the Δ g on tire shoulder
sp) and crown on strip component interval (Δ g
c), until find that the number of strip component meets relational expression Δ g
sp(N
n)≤Δ g
maxwith Δ g
c(N
n)≤Δ g
maxtill.
Meet described relational expression, be Δ g
sp(N
n)≤Δ g
maxwith Δ g
c(N
n)≤Δ g
maxthe number N of strip component
nby being configured to, equal N and representative is laid to form the true number according to the strip component of bracing ply of the present invention, this bracing ply has the angle α on crown and tire shoulder
cand α
sp, these two angles are as the function of the performance characteristic that expectation obtains on tire and selected.
Be noted that with Δ g
sp=S
sp/ N
n– L
sp/ sin α
spcalculating is at N
nstrip component interval during variation on tire shoulder, and with Δ g
c=S
c/ N
n– L
c/ sin α
ccalculating is at N
nthe strip component interval at equatorial plane place during variation.
The angle α with the pre-selected on tire shoulder
spthe angle α of the pre-selected at face place under the line
cand the width L of the pre-selected of strip component, and obtained the true number N of the strip component that will lay, can a large amount of a series of ply angle between tire shoulder and crown, obtain a laying track T now.
This moment, can be by (the circumferential angle of strike of strip component track) drafting in a plane for two limit curves or the intrinsic laying curve T of the N of previous discovery
0and T
maxand pictorialization ground obtains help, wherein T
0the laying of the theory for N the strip component track obtaining by setting Δ g=0, and T
maxby setting Δ g=Δ g
maxand the theory for N strip component obtaining is laid track.
In aforesaid chart, from the angle (α of the pre-selected of the equatorial plane
c) and tire shoulder on the angle of pre-selected start, to being positioned at the inner side of two limit curves and following the tracks of along a possible track of the circumferential extension of tire section, and detect point by point, form the angle that this lays track.
In following table, copied laying track T
0and T
maxangle, this laying track is to utilize N=63, width L=12mm and Δ g
maxthe strip component of=25mm obtains, and in the plane (the circumferential angle of strike of strip component track) of accompanying drawing expression be aforesaid intrinsic laying T
0and T
maxtwo curves and there is the difference selected angle α on tire shoulder and crown
spand α
cand meet relational expression Δ g
sp(N=63)≤Δ g
maxwith Δ g
c(N=63)≤Δ g
maxsome possible tracks.
Table 1
Claims (19)
1. the tire for sulky vehicle (1), described tire comprises:
The carcass structure of-general toroidal (2), described carcass structure (2) comprises the sidepiece of center bizet and two axial opposed, each sidepiece is relevant to corresponding bead structure;
-the belt structure of ring-type (5) roughly, described belt structure (5) is applied to the position of the radially outer of described carcass structure at bizet place, described center;
-tread strip (8), described tread strip (8) is applied to the position with respect to the radially outer of described belt structure (5);
-pair of sidewall, described in each, sidewall covers and is included in the transverse edge of described tread strip and the tire sidepiece between corresponding bead structure;
-described tire has cross curvature ratio f/C >=0.2 and sidewall height ratio (H-f)/H≤0.7, wherein f be on the equatorial plane of tire, measure, the distance from the line through the limit (E) of described tyre surface to tyre surface center, C is the width being limited by the distance between the horizontal contrary limit (E) of tyre surface, H be measure on face under the line, between the center of tread strip and close the section height between diameter;
-described belt structure (5) comprises that at least one is formed with the bracing ply of a plurality of strip components (15), and strip component described in each (15) comprises is arranged to the enhancing linear element that is parallel to each other along the longitudinal direction of described strip component (15);
-each enhancing element (13) is arranged on to be laid in track (T), and described laying track (T) is limited with the ply angle α with respect to the radial plane (λ) through this point of described tire at each some place;
-described the strip component (15) that forms described bracing ply is rendered as and is less than integral value N
0integral value N, N
0be defined as following whole part:
integer│(S
c/L*sinα
c)│
Wherein:
S
cthat described bracing ply is in the circumferential extension at the equatorial plane place of described tire;
α
cit is the ply angle at the described equatorial plane place of described tire;
L is the transverse width of each strip component,
Described bracing ply be included in a strip component last strengthen interval delta g between first enhancing element (13) of the next strip component in element (13) and circumferential direction, that change in mutually extrorse at least a portion of adjacent strip component (15).
2. tire (1) as described in claim 1, wherein, the ply angle α at tire shoulder place
spbe greater than the ply angle α at the equatorial plane place of described tire
c.
3. tire (1) as described in claim 2, wherein, the variation of described interval delta g is relevant with the angle difference at equatorial plane place on the tire shoulder of described tire, makes α
sp– α
c>=3 °.
4. tire (1) as described in claim 1, wherein, each between last enhancing element of a strip component and first enhancing element (13) of the next strip component in circumferential direction laid interval delta g of the described strip component at place between 0.35mm and 4mm, and extreme value is included.
5. tire (1) as described in claim 1, wherein, each between last enhancing element of a strip component and first enhancing element (13) of the next strip component (15) in circumferential direction laid interval delta g of the described strip component at place between 0.5mm and 2.5mm, and extreme value is included.
6. as tire in any one of the preceding claims wherein (1), wherein, α
c>=14 °.
7. tire as claimed in claim 1 (1), wherein, α
c≤ 24 °.
8. tire as claimed in claim 2 (1), wherein, α
sp>=21 °.
9. tire as claimed in claim 2 (1), wherein, α
sp≤ 30 °.
10. the technique for the manufacture of the tire for sulky vehicle, described tire is the type that is provided with cross curvature ratio f/C >=0.2 and sidewall height ratio (H-f)/H≤0.7, wherein f be on the equatorial plane of tire, measure, the distance from the line through the limit (E) of tyre surface to tyre surface center, C is the width being limited by the distance between the horizontal contrary limit (E) of tyre surface, H be measure on face under the line, between the center of tread strip and close the section height between diameter;
Described technique comprises the following steps:
-manufacture the carcass structure (2) of general toroidal, described carcass comprises the sidepiece of center bizet and two axial opposed;
-at bizet place, described center, manufacture the roughly belt structure of ring-type (5), described belt structure is positioned at the position of the radially outer of described carcass structure (2);
The step of the described belt structure of described manufacture (5) comprises by manufacturing at least one bracing ply at the upper a plurality of strip components (15) of laying of described carcass structure (2), and strip component described in each (15) comprises is arranged to the enhancing linear element that is parallel to each other along the longitudinal direction of described strip component (15); Wherein, the step of described at least one bracing ply of manufacture comprises:
-determine that the described enhancing element (13) of expectation acquisition on described tire is at the ply angle α at tire shoulder place
spply angle α with described equatorial plane place
c;
-being identified for manufacturing described bracing ply and the integral value N of the strip component (15) laid, N is less than integral value N
0, N
0that each strip component (15) is with respect to the ply angle α of the described equatorial plane
c, the transverse width L of each strip component and described bracing ply be at the circumferential extension S at the described equatorial plane place of described tire
cfunction;
-determine that the laying track (T) of described strip component, described laying track (T) are limited with the ply angle α through the radial plane (3) of this point with respect to described carcass structure at each some place, to obtain described angle α
sp, α
c;
-according to aforementioned laying track (T), lay the laying step of each strip component (15),
Wherein, described laying track (T) is confirmed as to strengthen element in last of a strip component (15) relevant with first the strip component laying interval delta g strengthening between element (13) along the next strip component (15) of laying of circumferential direction;
-described strip component is laid interval delta g and in controlled and predetermined mode, is changed at least one segment length of the corresponding laying track (T) of two strip components (15) of in succession laying along circumferential direction.
11. as described in claim 10 for the manufacture of the technique of the tire for sulky vehicle, wherein, and N
0be defined as following whole part:
integer│(S
c/L*sinα
c)│。
12. as described in claim 10 for the manufacture of the technique of the tire for sulky vehicle, and wherein, described laying step is to avoid the end of described strip component (15) to carry out in the overlapping mode in described tire shoulder place.
13. as described in claim 10 for the manufacture of the technique of the tire for sulky vehicle, wherein, described strip component is laid interval delta g at least one section of upper variation of the corresponding laying track (T) of two strip components in succession laying along circumferential direction, thereby obtain, is greater than the angle α at the equatorial plane place of described tire
cthe angle α on the tire shoulder of described tire
sp.
14. as described in claim 10 for the manufacture of the technique of the tire for sulky vehicle, wherein, described strip component is laid interval delta g at least one section of upper variation of the corresponding laying track (T) of two strip components in succession laying along circumferential direction, thereby obtains the angle α on the tire shoulder of described tire
spangle α with equatorial plane place at described tire
c, α wherein
sp– α
c>=3 °.
15. techniques for the manufacture of the tire for sulky vehicle as described in any one in aforementioned claim 10 to 14, wherein,
Described strip component between-mono-strip component and the next strip component of laying is laid interval delta g and is gone up variable at least one section of the corresponding laying track (T) of two strip components in succession laying along circumferential direction between the described equatorial plane and described tire shoulder, to produce the variation of described ply angle α, and obtain the ply angle α of the pre-selected on described tire shoulder
spply angle α with the pre-selected at described equatorial plane place
c.
16. techniques for the manufacture of the tire for sulky vehicle as claimed in claim 15, wherein, it is function below that the described strip component that each the laying point between described laying track (T) and a strip component and the next strip component of laying is located is laid interval delta g:
-largest interval Δ the g that applies
max;
The width L of-described strip component;
The ply angle of-pre-selected on described tire shoulder and at the ply angle of the pre-selected at described equatorial plane place.
17. techniques for the manufacture of the tire for sulky vehicle as claimed in claim 16, it comprises the following steps:
-calculating is corresponding to the number N of the strip component at the angle on described tire shoulder
spnumber N with the strip component at angle corresponding to described equatorial plane place
cbetween the minimum value in integer: min (
integer│ N
sp; N
c│);
-calculating N
1=min (
integer│ N
sp; N
c│)-1;
-calculating is for the strip component interval delta g on described tire shoulder of N1
spstrip component interval delta g with described equatorial plane place
c;
-by Δ g
spwith Δ g
cwith applied Δ g
maxcontrast:
If Δ g
sp≤ Δ g
maxand Δ g
c≤ Δ g
max, set so N
1=N;
On the contrary, if Δ g
sp>=Δ g
maxor Δ g
c>=Δ g
max, so with min (
integer│ N
sp; N
c│)-n calculates the N when n changes
n, and recalculate for each N
non described tire shoulder and crown on corresponding interval delta g
spwith Δ g
c; Set N=N
n, N wherein
nto meet relational expression Δ g
sp(N
n)≤Δ g
maxwith Δ g
c(N
n)≤Δ g
maxthe integral value of strip component.
18. as described in claim 17 for the manufacture of the technique of the tire for sulky vehicle, wherein, and N
c=(S
c/ L
c) * sin α
cand N
sp=(S
sp/ L
sp) * sin α
sp, S states the circumferential extension of bracing ply in place, α angle.
19. as described in claim 18 for the manufacture of the technique of the tire for sulky vehicle, wherein, and Δ g
sp=S
sp/ N
n– L
sp/ sin α
spand Δ g
c=S
c/ N
n– L
c/ sin α
c.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/IB2008/003598 WO2010073055A1 (en) | 2008-12-22 | 2008-12-22 | Tyre for two -wheeled vehicle and process for manufacturing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102300723A CN102300723A (en) | 2011-12-28 |
| CN102300723B true CN102300723B (en) | 2014-08-13 |
Family
ID=40427670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200880132718.9A Active CN102300723B (en) | 2008-12-22 | 2008-12-22 | Tyre For Two -wheeled Vehicle And Process For Manufacturing The Same |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US9017500B2 (en) |
| EP (1) | EP2393673B1 (en) |
| JP (1) | JP2012513333A (en) |
| CN (1) | CN102300723B (en) |
| BR (1) | BRPI0823311B1 (en) |
| WO (1) | WO2010073055A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102264554B (en) | 2008-12-22 | 2015-06-03 | 倍耐力轮胎股份公司 | Tyre for two-wheeled vehicle and process for manufacturing same |
| US20120012242A1 (en) * | 2010-07-14 | 2012-01-19 | Spirit Aerosystems, Inc. | Method and system for material placement over radiused edges |
| JP6444192B2 (en) * | 2015-01-30 | 2018-12-26 | 株式会社ブリヂストン | Pneumatic tires for motorcycles |
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| CN1222458A (en) * | 1997-12-29 | 1999-07-14 | 皮雷利轮胎股份公司 | High transverse-curvature tire for two-wheeled vehicles and method for its manufacture |
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| CN1337900A (en) * | 1999-11-26 | 2002-02-27 | 倍耐力轮胎公司 | Method and apparatus for manufacturing a reinforcing structure for tyres of vehicles |
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| IT1236885B (en) * | 1989-12-19 | 1993-04-26 | Pirelli | PROCEDURE FOR THE MANUFACTURE OF TIRES WITH A TORIC PROFILE WITH A HIGH CROSS CURVATURE, APPARATUS FOR ITS IMPLEMENTATION AND PRODUCT OBTAINED |
| JPH1178418A (en) * | 1997-09-05 | 1999-03-23 | Bridgestone Corp | Pneumatic tire for two-wheeled vehicle |
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| EP0943421B1 (en) | 1997-11-28 | 2003-05-28 | Pirelli Pneumatici Societa' Per Azioni | A method for making tyres for vehicle wheels |
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| ES2184371T3 (en) | 1998-07-31 | 2003-04-01 | Pirelli | MANUFACTURING PROCEDURE OF A HARMZON FOR TIRES AND ARMAZON AS OBTAINED. |
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-
2008
- 2008-12-22 EP EP20080875787 patent/EP2393673B1/en active Active
- 2008-12-22 US US13/141,288 patent/US9017500B2/en active Active
- 2008-12-22 WO PCT/IB2008/003598 patent/WO2010073055A1/en active Application Filing
- 2008-12-22 JP JP2011541618A patent/JP2012513333A/en active Pending
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- 2008-12-22 BR BRPI0823311A patent/BRPI0823311B1/en active IP Right Grant
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| CN1222458A (en) * | 1997-12-29 | 1999-07-14 | 皮雷利轮胎股份公司 | High transverse-curvature tire for two-wheeled vehicles and method for its manufacture |
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Also Published As
| Publication number | Publication date |
|---|---|
| EP2393673B1 (en) | 2012-11-28 |
| JP2012513333A (en) | 2012-06-14 |
| US9017500B2 (en) | 2015-04-28 |
| WO2010073055A1 (en) | 2010-07-01 |
| EP2393673A1 (en) | 2011-12-14 |
| BRPI0823311A2 (en) | 2015-06-23 |
| US20110308685A1 (en) | 2011-12-22 |
| BRPI0823311B1 (en) | 2020-01-28 |
| CN102300723A (en) | 2011-12-28 |
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